[valentino]

am doing the benzene production using HDA process.
i have done the whole flowsheet in Hysys and its working
now i need to do the optimization of any heat exchanger in the flowsheet, so as to reduce the operating cost of the process.
i have a heat exchanger E101. thats is used to heat up the inlet temperature. the heating agent is low presssure steam.
so what process variables can i use to optimize the HX.
thanks